Drilling-machine.



M. K. NAKAMURA. DRILLING MACHINE.

APPLICATION FILED JAN. 3, 1912.

1,032,292. Patented July 9,1912.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH (2a.. WASHINGTON, D. C.

M. K. NAKAMURA.

DRILLING MACHINE.

APPLIOATION FILED JAN. 3, 1912.

Patented July 9, 1912.

2 SHEETS-SHEET 2.

Masmw/mrfmm COLUMBIA PLANOGRAI'H 00.. WASHINGTON; n. c.

MASAWO K. NAKAMURA, OF SEATTLE, WASHINGTON.

DRILLIN C+1VIACHINE.

Specification of Letters Patent.

Patented July9, 1912.

Application filed January 3, 1912. Serial No. 669,291.

T 0 all whomit may concern:

Be it known that I, MASAWO K. NAKA- MURA, a subject of the Emperor of Japan, and a resident of the city of Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

My invention relates to machines of the above type, having more particular reference to machines for cutting holes of angular cross sectional contour and has for a fundamental object to provide a novel mechanism wherein the drill is intermittently rotated, and reciprocated during a pause of the drill spindle in an angular direction with respect to the axis of the latter.

Other objects will be set forth as my description progresses and those features of construction, arrangements and combinations of parts on which I desire protection, succinctly defined in my annexed claims.

Referring to the accompanying drawings wherein like numerals of reference indicate like parts throughout the several views: Figure 1 is a side elevation of my apparatus with portions broken away. Fig. 2 is a horizontal section through the upper portion of the apparatus, taken on line 2 of Fig. 1, and illustrating more particularly the intermittent driving mechanism for the drill spindle. Fig. 3 is a horizontal section taken on line 33 of Fig. 1, and illustrating more particularly the mechanism for reciprocating the drill. Fig. 4 is a vertical section through the drill reciprocating mechanism, and Fig. 5 is a section of the same mechanism but taken at right angles to Fig. 4. Fig. 6 is a detail plan illustrating the clutch shippers and their operating pinion. Fig. 7 is a diagrammatical View showing the mode of producing an angular hole, and Fig. 8 is a fragmentary elevation illustrating the releasable driving connection for the actuating mechanism for the drill socket carrier.

Referring to the drawing by numerals of reference, 1 indicates the drill spindle and 2 a ratchet wheel provided with afeather engaged in a feather-way 1 thereof and rotatably seated on the lower of bearings 3 in which the upper end portion of said spindle is held for rotary and axial movement. Ratchet wheel 2 is a part of my mechanism for intermittently rotating spindle 1. Cooperating with ratchet wheel 2 is,

a driving pawl 4, the latter being pivotally mounted on a carrier 5 mounted for oscillatory movement on spindle 1 beneath a locking member 6 having a feather, engaging in way 1.

Reference numeral 7 indicates acarrier or slide for the drill socket 8, the same being slidably guided in the lower end portion of a hollow support 9, conveniently in the form of a casing, for movement laterally of drill spindle 1.

The lower end portion of drill spindle 2 which projects into and has support9 fixed thereto, as at 10, pivotally supports a lever 11 having a slotted connection with carrier 7, see Fig. 5. Lever 11 is connected by a driving link 12 with the lower end portion of a lever 13, fulcrumed, as at 14, to support 9 and having its upper end portion connected with a crank 15, of a shaft 16, which latter pivotally connects lever 11 with drill spindle 1 and is journaled in support 9with one end portion projecting and provided with a pinion 17 having releasable driving connection therewith through the ratchet wheel and pawl device 18.

Reference numeral 19 indicates a drive gear seated on support 9 in mesh with pinion 17 and rotatably mounted on spindle 1. Gear 19 is provided with a vertical hub extension provided with a fixed ratchet wheel 25, a square or angular locking member 20, corresponding in general form to member 6, and a peripheral groove 21 in which a supporting bracket arm 22, of a slide 23 of column 24, is engaged.

Reference numeral 26 indicates a pawl carrier for the driving pawl 27 of ratchet wheel 25, the same being swingingly supported on the hub of gear 19, as shown more clearly in Fig. 4.

Support 9 is rotatably supported in a sleeve 28, provided with a rack 29 for engagement with a pinion 30, which latter is fixed to a drive shaft 32 journaled on head 31 and adapted to be operated in a well known manner, as shown, for effecting vertical adjustment of the drill spindle 1, support 9, and the'drill carrier slide reciprocating mechanism previously described. Slide 23 is operated in unison with support 9 by a pinion 32, journaled on head 31. Pinion 32 meshes with said pinion 30 and with a rack 33, the said rack being fixed to an arm 34, of slide 23, projecting inwardly into column 24, through a suitable and at all times be connected for rotary movement with the shaft 35.

Reference numeral 38 indicates an articulated driving connection between pawl carrier 26 and a crank disk 41, the latter being fixed to a shaft 39, journaled in slide 23 and provided with a bevel gear 40 meshing with gear 36. i

A crank disk 42, and driving connection 43 operates pawl carrier 5, to drive the drill spindle 1, alternately with the active movement of pawl carrier 26. Crank disk 42, which is journaled in a bracket 43, is driven through bevel gearing 43 fromv a shaft 44, which latter is also connected, through gearing 45, with shaft 35. Shaft 44 is driven through spur gearing 46 from a main drive shaft 47, the gear on shaft 44 being loose and provided with a clutch part for co5peration with a slidable clutch part 48 splined. to the shaft. Shaft 47 is provided with a loose pinion 49 which is in mesh with a gear 50, having a feather engaging in feather-way 1 of spindle 1, and provided with a clutch part for coaction with a slidable clutch part 51 splined to shaft 47.

Reference numerals 52 and 53 indicate shifters for clutch parts 48 and 51, the same consisting of rack bars meshing with a pinion 54, on a hand operated shaft 55, through the medium of which the said clutch parts can be simultaneously operated, one to its closed and the other to its open position.

Cooperating with looking members 6 and 20 are spring pressed slidably mounted members 6, 20 respectively on which levers, as 56, 56 of suitable releasing mechanisms, are pivotally mounted. Levers 56, 56 are pivotally supported, as at 56, 56", on relatively fixed parts, as shown, and provided on their free end portions with yieldingly held dogs 57, 57 a respectively, the former of which is yieldingly held in the path of a single tooth or projection 58 of carrier 5 and the latter in the path of a tooth or projection 58 0f carrier 26, as clearly shown in Figs. 2 and 3.

By this construction, active movement of carriers 5 and 26, first brings teeth 58, 58 into engagement with the adjacent dogs 57, 57 to effect a swinging of levers 56, 56'" and a consequent withdrawal of slidable looking members 6, 20 from members Gand 20, thereby permitting of the latter being given a partial rotation, following which, during reverse movements of the pawl carriers, the said slidable locking members will return to their locking positions. With clutch part 51 closed, drill spindle 1 will be driven continuously, at which time, locking member 6, and the connected lever 56 should obviously be withdrawn to an inoperative position. Any suitable mechanism can be provided for this purpose. A convenient method consists in providing a handle 57 on locking member 6 which can be grasped by the operator to slide the member outwardly, to bring the apertured lug 58 thereof over a lug 59 of the frame, following which operation, a pin (no-t shown) is inserted through the registering apertures of the lugs, as will be apparent by reference to Fig. 2.

Owing to the difficulty of drawing out chips in the forming of holes which are an gular in cross section, I first cut a circular hole in the work, supported on table 60, by operating spindle 1 continuously, as hereinbefore set forth, the said spindle during such boring operation being lowered either manually or automatically in the usual manner. Following this step, clutch part 51 is disengaged and clutch part 48 engaged. With the parts thus adjusted, spindle 1 will be intermittently rotated, being given a quarter turn during each step of its movement, and during the pauses drill 61 will be reciprocated, being always returned to a position wherein its side cutting edges are disposed centrally with respect to the opening being formed, see Fig. 7. If desired this squaring of the circular hole can be carried on by successive steps, the drill being lowered after each complete revolution thereof, as will be readily understood.

While I have herein shown my apparatus constructed for forming square openings, I do not limit myself in this respect, it being apparent that by modifying the mechanism to effect a decrease or increase in the length of the step-like movements of the drill spin die and altering the co6perating mechanism in conformity therewith, that openings of any desired cross sectional form can be produced.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States of America,

1. In a drilling machine, a drill spindle, supporting means therefor, a' drill socket, an intermediate pivotal member connecting said spindle and said socket for both rotary movement and independent sidewise movement of said socket, means for rotating said spindle intermittently, and means for reciprocating said socket laterally of said spindle during each intermission in the rotation of the latter.

2. In a drilling machine, a drill spindle,

supporting means therefor, a carrier supported for movement laterally of said spindle and provided with a drill socket, means connecting said carrier with said drill for rotation therewith and for relative lateral movement, means for intermittently rotating said spindle, and means for operating said carrier during each intermission in the rotation of said spindle.

3. In a drilling machine, a drill spindle, a drill socket carrier, guide means for said carrier connected for rotation with said spindle, means for intermittently rotating said spindle, and means for reciprocating said carrier during each intermission in the rotation of said spindle.

4. In a drilling machine, a drill spindle, means supporting said spindle for rotary and endwise movements, a drill socket, means connecting said drill socket with said spindle for both rotary movement and independent sidewise movement, means for intermittently rotating said spindle, and means for imparting sidewise motion to said drill socket during each intermission in the rotation of said spindle.

5. In a drilling machine, a drill spindle, a casing receiving the lower end portion of said spindle and connected for rotation therewith, a drill socket carrier slidably supported on said casing, a lever fulcrumed in said casing and connected with said carrier for reciprocating the same, means for i11- termittently rotating said spindle, and means for oscillating said lever during each intermission in the rotation of said. spindle.

6. In a drilling machine, a drill spindle having a hinged lower end section, a drill socket carrier pivotally connected with the hinged. section of said spindle, means for guiding said carrier for movement crosswise of said spindle, means for intermittently rotating said spindle, and means for reciprocating said carrier during each intermission in the rotation of said spindle.

7. In a drilling machine, a drill spindle, a casing connected with said spindle for retation therewith, a drill socket carrier supported in said casing for relative lateral movement, a lever for reciprocating said carrier fulcrumed in said casing, a shaft journaled in said casing and provided with a crank connected with said lever, means for intermittently rotating said spindle, and means for rotating said crank shaft during each intermission in the rotation of said spindle.

8. In a drilling machine, a drill spindle, a casing connected with said spindle for rotation therewith, a drill socket carrier sup ported in said casing for relative lateral movement, a lever for reciprocating said carrier fulcrumed in said casing, a shaft journaled in said casing and provided with a crank connected with said lever, a pinion on said shaft, a loose drive gear on said spindle meshing with said pinion, and means for driving said spindle and said drive gear alternately.

9. In a drilling machine, a drill spindle,

means supporting said spindle for rotation and for endwise adjustment, means for intermittently rotating said spindle, a gear loose on said spindle, a drill socket carrier connected with said spindle for rotation therewith and being free for independent lateral movement, a crank shaft, means supporting said crank shaft for adjustment with said spindle, a pinion on said crank shaft meshing with said loose gear, a driv ing connection between said shaft and said socket carrier, and means for rotating said shaft during each intermission in the rotation of said spindle.

10. In a drilling machine, a drill spindle, means supporting said spindle for rotation, a drill socket connected with said spindle for both rotary and independent sidewise movement, means for intermittently rotating said spindle, a loose gear on said spindle, a driving connection between said gear and said socket for effecting sidewise movement of the latter, a ratchet wheel connected to said gear, an oscillatory member provided with a pawl for engagement with the teeth of said ratchet wheel, means for intermittently rotating said spindle, and means swinging said oscillatory member to drive said ratchet wheel during each intermission in the rotation of said spindle.

11. In a drilling machine, a drill spindle, means supporting said spindle for rotation, a drill socket connected with said spindle for both rotary and independent sidewise movement, means for intermittently rotating said spindle, a loose gear on said spindle, a driving connection between said gear and said socket for effecting sidewise movement of the latter, a ratchet wheel connected to said gear, an oscillatory member provided with a pawl for engagement with the teeth of said ratchet wheel, means for intermittently rotating said spindle, means swinging said oscillatory member to drive said ratchet wheel during each intermission in the rotation of said spindle, and means for locking said ratchet wheel during rotation of said spindle.

12. In a drilling machine, a drill spindle, means supporting said spindle for rotation, a drill socket connected with said spindle for both rotary and independent sidewise movement, means for intermittently rotating said spindle, a loose gear on said spindle, a driving connection between said gear and said socket for efiecting sidewise move ment of the latter, a ratchet wheel connected to said gear, an oscillatory member provided with a pawl for engagement with the teeth of said ratchet wheel, means for intermittently rotating said spindle, means for looking said ratchet wheel during rotation of said spindle, and means actuated by and during movement of said oscillatory memher for releasing said locking means.

' 13. In a drilling machine, a drill spindle supported for rotary movement, a ratchet wheel connected to said spindle for rotation therewith, a driving pawl for said ratchet wheel, means for operating said driving pawl to intermittently rotate said spindle, a drill socket connected with said spindle for both rotary and independent sidewise movement, and means for reciprocating said drill socket laterally of said spindle during each intermission in the rotat-ion of the latter.

14. In a drilling machine, a drill spindle, means supporting said spindle for rotary and axial movements, a drill socket carrier connected with said spindle for both rotary and independent sidewise movement, a drive shaft, means for driving said shaft continuously, mechanism connected with said shaft for intermittently rotating said spindle, and other mechanism connected with said shaft for reciprocating said socket carrier during each intermission in the rotation of said spindle,

15. In a drilling machine, a drill spindle, means supporting said spindle for rotary and axial movements, a drill socket carrier connected with said spindle for both rotary and independent sidewise movement, a drive shaft, crank members connected with said shaft for rotation thereby, means for intermittently rotating said spindle connected with one of said crank members, and means for reciprocating said socket carrier during each intermission in the rotation of said spindle connected with the other of said crank members.

16. In a drilling machine, a drill spindle, means supporting said spindle for rotation, a pair of power transmitting shafts, driving mechanism for connecting said spindle with one of said shafts to receive continuous motion therefrom, driving mechanism connected with the other of said shafts and said spindle for intermittently rotating the latter, clutches for connecting each of said driving mechanisms with its respective shaft, and means for simultaneously operating said clutches one to its operative and the other to its inoperative position.

Signed at Seattle, WVashington this 13th day of December 1911.

MASAWO K. NAKAMURA.

l/Vitnesses ARLITA ADAMS, CLARA HARM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents- Washington, D. G. 

